Apparatus for exhausting air and non-condensable gases



A. E. L SCANES.

APPARATUS FOR EXHAUSTING AIR AND NON-CONDENSIBLE GASES. APPLICATION FILED OCT. 10, 1916.

1,346,980, Patented July 20, 1920.

WITNESSES. I INVENTOR.

/ 6 1% o6. SUM,

UNITED STATES PATENT OFFICE.

ARTHUR EDWIN LE GH s eANEs, F AsHToN-oN-MERsEY, ENGLAND, .AssIGNoR To THE BRITISH WESTINGHOUSE ELECTRIC AND MANUFACTURING COMPANY, LIM- ITED, A COMPANY ORGANIZED UNDER THE LAWS OF GREAT BRITAIN.

APPARATUS FOR EXHAUSTING AIR AND N ON-CONDENSABLE GASES.

Application filed October 10, 1916.

To all whom it may concern:

Be it known that I, ARTHUR EDWIN LEIGH ScANEs, a subject of the King of Great Britain, and a resident of Ashto'n-on-Mersey, in the county of Chester, England, have invented a new and useful Improvement in Apparatus for Exhausting Air and Non- Conclensable Gases, of which the following is a specification.

My invention relates to apparatus for exhausting air and non-condensable gases, and has for its object to provide an improved apparatus of this character.

The improved apparatus of my invention comprises one or more steam ejectors and a multi-stage water ejector so connected that the air and non-condensable gases to be exhausted are withdrawn through a pipe by means of the steam ejector or ejeetors and the mixture of steam and gases is discharged into the final or an intermediate stage of the water ejector but is prevented from communicating directly with the primary stage of the water ejector. The steam from the steam ejectors is condensed in the final or intermediate stage or" he water ejector and the air and non-condensable gases not carried away by the final or intermediate stage of the water ejector are conducted through a pipe or passage from the final or intermediate stage to the primary or suction stage of the water ejector where they are mixed with the water and compressed to any desired pressure during discharge.

The accompanying drawing shows diagrammatically, by way of example, two forms of apparatus embodying the invention in which Figure 1 is a schematic view in sectional elevation of a device embodying this invention utilizing a rotatable impeller for projecting the water forming the jet and Fig. 2 is a schematic view in sectional elevation of a modified form of said device in which a simple type of water ejector is used.

In Fig. 1 the inlet for the air and non condensable gases to be exhausted is shown at 3, 4; being a steam nozzle which, with its combining tube and difluser, forms asteam ejector 5. The delivery from the steam ejector 5 is led by a pipe 6 to a chamber 7 which, as here shown, is connected with a well known form of multi-stage water jet rotary pump 8 in such a manner that di- Speeification of Letters Patent.

Patented July 20, 1920.

Serial No. 124,854.

rect communication with the primary stage thereof is'prevented. .The function of the superposed nozzles in the chamber 7 is, as is'well known, to give stability to the water jet while in operation and give it the necessary length to enable it to condense the steam. A passage 9 leads from the cham bar 7 to the primary stage 10 of the pump 8. In some cases the passage 9 may have open- Ings as shown communicating with the second and tertiary stages of the ejector. A diaphragm 11 pierced with a small hole 12 is located in the passage 9 which, while allowing the free passage of air and noncondensable gases effectively prevents any excessive amount of steam from the ejector reaching the primary stage 10 of the pump.

In operation steam from the steam ejector 5 will be condensed by the water passing through the chamber 7 of the pump 8 while the air and non-condensable gases will pass up through the passage 9, as indicated by the arrows, to the primary stage 10 of the pump, and will be compressed and discharged to atmosphere or elsewhere as may be required.

In Fig. 2 the invention is shown applied to a simple type of water ejector supplied with water under pressure from any suitable source. In this case the pipe 6 is connected to the final and intermediate stages only of the water ejector. Otherwise the construction and operation of this form of the invention is similar to that of Fig. l and will be understood without any further detailed description thereof.

Although I have shown only a single steam ejector with a single steam nozzle a plurality 01" steam nozzles or ejectors may be provided in a manner well known in the art.

I claim as my invention:

1. In an air and non-condensable gas exhaust apparatus, a multi-stage water ejector, a steam ejector connected for discharge to a stage of said water ejector other than the initial stage, and a passage for delivering fluid from said stage around the initial stage to the inlet thereof.

.2. In an air and noncondensable gas exhaust apparatus, a water ejector comprising water delivery means, a chamber, a diffuser, a stabilizer within the chamber between said delivery means and said diffuser,

a passage around said stabilizing means and a steam ejector discharging into the chamber between the outlet of said stabilizer and the inlet of said diffuser.

3. In an air. and non-condensable exhaust gas apparatus, the combination of liquid delivery means, a chamber, acombining and collecting tube receiving liquid from the delivery means, stabilizing means Within the chamber receiving the discharge from the combining and collecting tube, a steam ejector discharging into said chamber below the stabilizing means, and a fluid passage placing the outlet of the stabilizing means in communication with the inlet of the combining and collecting tube. V

' 4. Apparatus for exhausting air and noncondensable gases, com'prising a steam ejector, a multi-stage Water ejector, the delivery ofthe steam ejector being connected to a stage other than the initial stage of the Water ejector but prevented from communiv eating directly With the primary stage of the Water ejector, said stage of: the Water ejector being connected With the primary stage of the Water ejector by a passage substantially as described. 7 v

5. In an air and'non-condensable gasexhaust apparatus, a multi-stage Water ejector, a steam ejector connected for discharge to a stage of said Waterejector other than the initial stage, a passage for delivering fluid from said stage around the initial stage to the inlet thereof, and means Within the passage for obstructing the flow of condensable fluids While allowing the free passage of non-condensable fluids. r

' 6. In an air and non-condensable gas exhaust apparatus, a multi-stage Water ejector,

a steam ejector connectedfor discharge to a stage of said Water ejector other than the U initial stage,z-a passage for delivering fluid from said stage around the initial stage to the inlet thereof, and a diaphragm ithin the passagdhaving an aperture therein whereby the .floW of condensable fluids through the passage is obstructed while allowing the flow of non-condensable fluids.

In testimony whereof I have hereunto subscribed my name this 21st day of September 1916. r r

V ARTHUR EDWIN LEIGH SCANES.

Witnesses:

Gno. H. PARKINsON, DOROTHY PENNINGTON. 

